racerx01

I would like to put a RB exhaust system on my stock 85 GS 12A with manual trans. I will in the future most likely change carb to high performance carb (still not sure which one, leaning towards a "fat Nikki"). Anyway which exhaust would you recommend; Street port or long primary system? And why? Not planning to port the motor anytime soon, only has 35K on it. I am ok with increased noise as long as not insanely loud and does not drone while driving on interstate.

j9fd3s

iTrader: (3)

long primary. top end power is about the same, but the long primary system makes more low end.

Jeff20B

iTrader: (13)

Long primary makes more power everywhere. It also doesn't drone.

miasmicmonky

iTrader: (1)

Everyone here seems to recommend the long primaries, sadly I went with the short before I knew. I wish I would have done the research. Either way, it was a big increase in power over stock! I also have a Magnaflow muffler on the end so it is loud with a lot of drone. Do I regret it? when I am on long trips yes, because my ears start to hurt a little from drone, but when I am not on long trips, no I do not!

However I have never driven a car with long primaries from RB.

t_g_farrell

iTrader: (1)

You want the RB SP (long primary) exhaust system. Get the whole thing from header to muffler,
don't skimp and it will have a great sound, execellent low end response and can be used
unchanged with any other intake or ignition changes you have planned in the future.

BTW, a fat nikki is a really cost effective way to get fantastic performance out of your stock port
12A. You can't go wrong with it.

RotoricanNY

iTrader: (2)

How loud/quiet is that system?